EQUISETALES— CALAMARIE.E— CALAMITES. 145 



difference between the modern JEquisetum and the Paleozoic type is largely 

 a matter of degree rather than fundamental. 



Quite in accord with this conclusion are the observations of Mr. Thomas 

 Hick, who finds in Calamostacliys Binneyana an axial structure agreeing in 

 its details with the Artliropitus type, while the sporangiophores are dilated 

 at the summit to form a shield, much as in JEquisetum, with the anatomical 

 characters of which the fossil has much that is in common or similar.^ 



The relation of some Annularian forms to the Equiseta and Catamites 

 will be mentioned in connection with the Annularice. 



Calamites ramosus Artis. 



1825. Calamites ramosus Artis, Antertil. Phytol., pi. ii. 



1828. Calamites ramosus Artis, Bronguiart, Hist. veg. loss., p. 1 27, pi. xvii, fig. 5 (non 6). 



1835. Calamites ramosus Artis, Gutbier, Abdriicke, p. 18, pi. ii, fig. 6. 



1848. Calamites ramosus Artis, Sauveur, Veg. foss. terr. bouill. Belg., i>]. is, fig. 2; 



pi. X, figs. 1, 2. 

 1877. Calamites ramosus Artis, Graud 'Eury, Fl. carb. Loire, p. 20, pi. ii, fig. 4. 

 1879. Calamites ramosus Artis, Lesquereux, Coal Flora, Atlas, p. 1, pi. i, fig. 2; text, 



vol. i (1880), p. 22. 

 1882. Calamites ramosus Artis, Renault, Oours. bot. foss., vol. ii, p. 163, pi. xxiv, 



figs. 8, 9. 

 1884. Calamites ramosus Artis, Lesquereux, Coal Flora, vol. iii, p. 702, pi. xcii, figs. 1-4. 



1886. Calamites ramosus Artis, Zeiller, Fl. foss. Valenciennes, Atlas, pi. Iv, fig. 3; pi. 



Ivi, fig. 3; text (1888), p. 345. 



1887. Calamites ramosus Artis, Stur, Cal. Scbatzlar. Sch., p. 96, pi. xii, figs. 1-6; p]. 



xiib; pi. xiii, figs. 1-9; pi. xiv, figs. 3-5; text figs. 1, 2, 28, 29, 31, 32. 



1888. Calamites ramosus Artis, Toula, Die Steiukoblen, p. 205, pi. v, fig. 24. 



1851. Calamites communis Ettingshausen (pars), Beitr. Fl. Vorw., p. 73 (ex parte syn.). 



1877. Calamites nodosus Scliloth., Lebour, Illustr., pis. ii, iii. 



1884. Calamites [Eucalamites) ramosus Artis, Weiss, Steiuk.-Gal., vol. ii, p. 98, j)!. ii, 



fig. 3; pi. V, figs. 1, 2; pi. vi; pi. vii, figs. 1, 2; pi. viii, figs. 1, 2, 4; pi. ix, fig. 



1; pi. X, fig. 1; pi. XX, figs. 1, 2. 

 18S6. Calamites [Eucalamites) ramosus Artis, Kidston, Foss. PI. Lauarksh., p. 51. 

 1893. Calamites {Eucalamites) ramosus Artis, D. White, Bull. U. S. Geol. Surv., no. 98, 



p. 17. 



1887. Eucalamites {Calamites) ramosus (Artis) Kidston, Foss. Fl. Eadstoek Ser., p. 341. 



1889. Eucalamites {Calaonites) ramosus (Artis) Kidston, Foss. PI. Eavenhead coll., 



p. 400. 



1888. Eucalamites ramosus (Artis) Kidst., Schenk, Die foss. Pflanzeur., p. 125. 

 Foliage and fructification: see Annularia ramosa Weiss (Calamostachys 



ramosa Weiss). 



' Proc. Yortsh. Geol. Polytech. Soc, vol. xii, 1893, pt. iv, pp. 279-293, pis. xiv-sv. 

 MON XXXVII 10 



